Learn more about Costa Sunglasses Named for small islets made of crushed coral sand, Costa Motu 580G Polarized Sunglasses have a lightweight nylon frame for all-day comfort. These Costa boating and fishing sunglasses have a relieved curvature that hugs your face and polarized lenses to block reflected glare, especially on the water. LightWAVE glass lenses provide 100% UV protection plus unmatched clarity, contrast and definition. Costa 580 technology takes lens performance to new heights by eliminating glare from yellow light and boosting red, blue and green resulting in deeper colors and sharper contrast. The 580 lenses also feature both a water-repellent coating and an anti-reflective coating. Costa Motu 580G Polarized Sunglasses are built by hand for ultimate quality and performance. Optical spring hinges and rubberized inserts on the temple tips ensure a comfortable fit. Ideal for medium face sizes. Includes hard case and cleaning cloth. About your Costa lenses: Blue Mirror Encapsulated mirrors deliver superior contrast and color in full sun and eliminate glare (gray base). Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Polarized.